jrockfl - 3:23 pm on Jan 7, 2013 (gmt 0)

It's not just the actual shopping cart application that needs to be looked at, you need to look at hardware too.
You need to consider, os, web server, database server, etc.
Also, the architecture of the database. Correct use of indexes, primary keys, etc...

I'm a senior .net developer and I wrote our e-commerce application. We have 2 servers right now, 1 database server and 1 web server.

We get up to 1000 concurrent users.